package com.thh.core.web.exception;

import com.alibaba.druid.pool.DruidDataSource;
import com.thh.common.core.model.AjaxResult;
import com.thh.common.exception.DemoModeException;
import com.thh.common.exception.ServiceException;
import com.thh.common.exception.sql.SqlException;
import com.thh.common.utils.ServletUtils;
import com.thh.common.utils.StringUtils;
import com.thh.common.utils.security.PermissionUtils;
import com.thh.core.manager.DataSourcePoolManager;
import org.apache.shiro.authz.AuthorizationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.BindException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import java.util.Map;

/**
 * 全局异常处理器
 * 
 * @author thh
 */
@RestControllerAdvice
public class GlobalExceptionHandler
{
    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    /**
     * 权限校验异常（ajax请求返回json，redirect请求跳转页面）
     */
    @ExceptionHandler(AuthorizationException.class)
    public Object handleAuthorizationException(AuthorizationException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',权限校验失败'{}'", requestURI, e.getMessage());
        if (ServletUtils.isAjaxRequest(request))
        {
            return AjaxResult.error(PermissionUtils.getMsg(e.getMessage()));
        }
        else
        {
            return new ModelAndView("error/unauth");
        }
    }

    /**
     * 请求方式不支持
     */
    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
    public AjaxResult handleHttpRequestMethodNotSupported(HttpRequestMethodNotSupportedException e,
            HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',不支持'{}'请求", requestURI, e.getMethod());
        return AjaxResult.error(e.getMessage());
    }

    /**
     * 拦截空指针异常
     */
    @ExceptionHandler(NullPointerException.class)
    public AjaxResult handleNullPointerException(NullPointerException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',发生空指针异常.", requestURI, e);
        return AjaxResult.error("系统异常");
    }

    /**
     * 拦截未知的运行时异常
     */
    @ExceptionHandler(RuntimeException.class)
    public AjaxResult handleRuntimeException(RuntimeException e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',发生未知异常.", requestURI, e);
        return AjaxResult.error(e.getMessage());
    }

    /**
     * 系统异常
     */
    @ExceptionHandler(Exception.class)
    public AjaxResult handleException(Exception e, HttpServletRequest request)
    {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',发生系统异常.", requestURI, e);
        return AjaxResult.error(e.getMessage());
    }

    /**
     * 业务异常
     */
    @ExceptionHandler(ServiceException.class)
    public Object handleServiceException(ServiceException e, HttpServletRequest request)
    {
        log.error(e.getMessage(), e);
        if (ServletUtils.isAjaxRequest(request))
        {
            return AjaxResult.error(e.getMessage());
        }
        else
        {
            return new ModelAndView("error/service", "errorMessage", e.getMessage());
        }
    }

    @Autowired
    private DataSourcePoolManager dataSourcePoolManager;

    @ExceptionHandler(SqlException.class)
    public Object handleServiceException(SqlException e, HttpServletRequest request)
    {
        log.error(e.getMessage(), e);
        String errorMsg = e.getMessage();
        if (errorMsg.contains("wait_timeout")) {
            errorMsg = "抱歉，数据库连接已过期，请刷新一下页面重新获取！";
            // 移除掉数据源
            Map<String, DruidDataSource> dataSourcePoolManagerMap = dataSourcePoolManager.getDataSourcePoolManagerMap();
            DruidDataSource druidDataSource = dataSourcePoolManagerMap.get(String.valueOf(e.getDatabaseId()));
            druidDataSource.close();
            dataSourcePoolManagerMap.remove(String.valueOf(e.getDatabaseId()));
        }
        if (ServletUtils.isAjaxRequest(request))
        {
            return AjaxResult.error(errorMsg);
        }
        else
        {
            return new ModelAndView("error/service", "errorMessage", e.getMessage());
        }
    }

    /**
     * 自定义验证异常
     */
    @ExceptionHandler(BindException.class)
    public AjaxResult handleBindException(BindException e)
    {
        log.error(e.getMessage(), e);
        String message = e.getAllErrors().get(0).getDefaultMessage();
        return AjaxResult.error(message);
    }

    /**
     * 演示模式异常
     */
    @ExceptionHandler(DemoModeException.class)
    public AjaxResult handleDemoModeException(DemoModeException e)
    {
        return AjaxResult.error("演示模式，不允许操作");
    }
}
